"You are old," said the youth, "as I mentioned before,
And have grown most uncommonly fat;
Yet you turned a back-somersault in at the door -
Pray, what is the reason for that?"

"In my youth," said the sage, " as he shook his grey locks,
"I kept all my limbs very supple
By the use of this ointment - one shilling the box -
Allow me to sell you a couple!"

Lewis Carol, Alice's Adventures in Wonderland